By a statute for ever. — That is, the statute that these two parts of the peace offering are to be given to Aaron and his descendants who may officiate at this sacrifice, is binding upon the Israelites as long as the priesthood lasts.
Related Commentaries of Leviticus 7:34
Leviticus 7:34
34 For the wave breast and the heave shoulder have I taken of the children of Israel from off the sacrifices of their peace offerings, and have given them unto Aaron the priest and unto his sons by a statute for ever from among the children of Israel.